This book is not only a famous collection of nature essays, but also an important natural history observation note. It records in detail what Thoreau saw, heard and thought during his seclusion at Walden Pond. In this simple attempt to live a self-sufficient life by opening up wasteland and cultivating land, Thoreau's heart is intertwined with desire and disappointment, recognition and doubt, determination and confusion, which reflects his attitude of challenging personal and even human boundaries and gaining strength in life.
